20987769

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{37}}^1\times {\mathrm{17189}}^1$

素因数の和:17240

約数の個数: 16

約数和(自身を含む): 31354560

約数和(自身を除く): 10366791

約数列:

[1, 3, 11, 33, 37, 111, 407, 1221, 17189, 51567, 189079, 567237, 635993, 1907979, 6995923, 20987769]

約数ペア:

[(1, 20987769), (3, 6995923), (11, 1907979), (33, 635993), (37, 567237), (111, 189079), (407, 51567), (1221, 17189)]